Non-Woven Geotextile Membrane: Is Thicker Better?

Non-Woven Geotextile Membrane: Is Thicker Better?

A thicker membrane is indeed stronger. But does it mean a thick geotextile membrane will work on all projects?

Although the thickness of the membrane provides more strength, it affects filtration ability and flexibility, which won’t be very useful for projects that require adequate drainage. There is undoubtedly a place for thick geotextile membranes, just not for all applications.

Let’s look at what you can use the geotextile membranes for at the different levels of thickness.

 

White Non-Woven Geotextile Membrane

Geotextile membranes are fabric sheets that can be installed during construction or landscape projects. And a multitrack non-woven geotextile fleece membrane is designed for separation, filtration, and protection. The layer is also for weed prevention, so weeds won’t be able to grow through, blocking the channel and affecting the drainage system.

Firstly, we have the NW6/EG80. It is the thinnest membrane we sell in weight of 80gsm; it has been manufactured in a thermal bond, so the web is secure and has excellent stiffness. The low density of fibre in this thin membrane makes it highly permeable, perfect for projects requiring water circulation and having low strength demands.

Thermal bond also called heat bonding, is a process of joining the fibre together by melting the crossover point, making the membrane stronger since the web is stuck together.

The second geotextile membrane is the most used non-woven membrane, NW8, a 100gsm membrane made in a thermal bond. The slight increase in weight allows this membrane to take up more pressure, suitable for driveways, soakaway crates and other general separation projects.
Next up, we have the NW18 with a weight of 215gsm. This membrane has been thermal bonded and needle-punched, making it stronger than NW8. You can lay NW18 in areas with heavy-duty vehicles or busy traffic.

Needle-punched uses needle barbs to entangle the fibre and form a 3D structure that is more bulk by nature, with good pore size distribution, resulting in good drainage and reinforcement.

The fourth membrane is the SNW40, the weight is 300gsm, and it was needle-punched. The thickness of the membrane may have influenced flexibility and permeability compared to the previous three membranes. In return, this membrane offers cushioning and reinforcement, ideal for commercial use in horse arenas and railway constructions.
Last but not least, we have SNW80, the thickest non-woven geotextile membrane, in stock. A thick needle-punched membrane with a big step up in weight to 650gsm is particularly effective in reinforcing soft or irregular surfaces, such as landfills, coastal erosions, and sea defence.

 

Summary

A non-woven geotextile membrane is an essential underlay for successful ground reinforcement. Hence, we want to ensure you pick the right product for your project without spending more than you need to.

If you have any questions, please get in touch with us at sales@geotextilemembranes.co.uk.